Telescoping hood for a disc grinder



Aug. 6, 1957 DUNN TELESCOPING HOOD FOR A DISC GRINDER 3 Sheets-Sheet 1 Filed Sept. 6, 1956 INVENTOR ELM/MI Awu/v/v BY TTORNEZY Aug. 6, 1957 DUNN 2,801,500

TELESCOPING HOOD FOR A DISOGRINDER V Filed Sept. 6, 1956 3 Sheets-Sheet 2,

INVENTQR ELMANI R. pu/wv r/{ km TTORNEY 7 E. R. DUNN TELESCOPING noon FOR A DISC GRINDER Filed Sept. 6, 1956 3 Sheets-Sheet 5 VINVENTOR ELMAN A. nu/wv Z. TTORNEY United States Patent TELESCQPING HOSE) F6311 A. DESC GRINDER Elman R. Dunn, Beloit, Wis., assignor to Gardner lllachine Company, Beioit, Wis.

Application September (a, 1956, Serial No. 608,331

4 Claims. (Cl. SL409) This invention relates to disc grinders of the type having angularly opposed discs rotatably supported on horizontal spindles.

Machines of this type usually have a stationary wheel guard designed to enclose both wheels in all positions of adjustments for which the machine is designed. When it becomes necessary to replace a worn disc, the entire wheel guard must be disassembled and removed from the machine.

It is an object of this invention to provide wheel guards having essential stationary sections with one or more movable telescoping sections which may be selectively attached to the stationary member or to the wheel support.

Another object of this invention is to provide a sectional wheel guard which is normally attached to and movable with the wheel support and which has a removable upper section to which the discs may be removed from the machine.

Figure 1 is a front elevation of the upper portion of a disc grinder with the wheel guard in section.

Figure 2 is an enlarged sectional elevation of a portion of the wheel guard showing the relation between the parts and between the guard andthe abrasive discs.

Figure 3 is an enlarged sectional elevation showing the relation of the various parts when the telescoping portion of the hood is attached to the wheel support.

Figure 4 shows the relation between the parts when the telescoping portion of the hood is attached to the stationary support preparatory to the withdrawing of the discs and removing it from the machine.

Figure 5 is a end elevation showing the wheel guard and the bracket by which the telescoping section may be attached either to the wheel guard or the stationary guard member.

Numeral indicates the bed of a disc grinder. 11 is a slide member longitudinally adjusted on said bed 10 and a spindle housing 12 longitudinally adjusted on said slide member 11. Abrasive discs 13 are mounted on a spindle (not shown) rotatably supported in spindle housing 12. Motor 14 is on said spindle housing 12 and connected through suitable means to drive said spindle.

The means for guarding the abrasive discs 13 consist of a stationary hood member 20. A ring-like telescoping member 21 is inside said stationary hood member and hood end member 22 is inside said telescoping member 21 and in telescoping relations thereto. The purpose of the telescoping member 21 is to provide a hood member movable with every adjustment of the slide so that abrasive discs 13 are covered in all positions of adjustments for workpieces of all thicknesses within the range of the machine.

Brackets attached to said telescoping member by screws 31 are normally secured to bracket on slide member 11 by means of screws 41 as shown in Figure 3. Hood end member 22 is made in an upper and lower section. The upper section A is secured to said spindle housing 12 by means of screws 23 in Figure 5.. By removing said screws, said upper section can be lifted off the machine and the abrasive discs 13 may be removed through. the opening provided thereby.

In Figure 4, screws 41, which hold brackets 30 and 40 together, have been removed. Screws 41 are then used to secure brackets 30 on telescoping member 21 to attach said member to stationary hood member 20. Slide 11 may then be shifted to withdraw abrasive discs 13 and hold said hood end member 22 to a position in which said abrasive discs 13 are clear of said stationary and telescoping hood members.

I claim:

1. In a grinding machine, a bed, a slide member mountedthereon and having guide surfaces, a grinding wheel support having guide surfaces for co-acting with said first guide surfaces, means for rotatably supporting a grinding wheel on said support, a hood mounted in fixed relation on said bed and surrounding said grinding wheel when said wheel is in operative position, and adjustable hood mounted concentrically within said fixed hood, said adjustable hood being connected to and movable with said wheel support, means for transferring said connections on said wheel support to the fixed hood so that said wheel may be withdrawn from said adjustable hood, a third hood member attached to said wheel support and having a removable upper section, said third hood member being movable in said adjustable hood and concentric thereto, means for moving said wheel support axially to remove said wheel and said third hood member from said adjustable hood whereby to permit removal of said upper section and said grinding wheel.

2. In a grinding machine, a bed, a slide member mounted thereon and having guide surfaces, a grinding wheel support having guide surfaces for co-acting with said guide surfaces on said slide, means for rotatably supporting a grinding wheel on said support, wheel guard means comprising a fixed hood member mounted on said bed, an adjustable member mounted in telescoping relation in said first member and normally attached to and movable with said slide member, a third hood member mounted on said wheel support and operable in teles coping relation with said adjustable hood member, said third member having a removable upper portion to permit vertical removal of said grinding wheel.

3. In a grinding machine, a bed, a slide member mounted for axial adjuspnent thereon, a tool supporting member slidably mountedbn, d slide member, an abrasive disc rotatably mounted on id tool supporting member, a hood mounted in fixed posifi bn pn said bed and normally surrounding said disc, an adjustable hood mounted concentrically within said fixed hood and being selectively connected with said slide or said fixed hood, and a third hood member mounted for movement with said tool support and having a removable portion through which said disc may be removed from the machine.

4. In a grinding machine, a bed, a slide member mounted for axial adjustment thereon, a tool supporting member slidably mounted on said slide member, an abrasive disc rotatably mounted on said tool supporting member, a hood mounted in fixed position on said bed and normally surrounding said disc, an adjustable hood slidably mounted in telescoping relation with said fixed hood and being normally connected with said slide, and a third hood member mounted on said tool support in telescoping relation with said adjustable hood for movement with said tool support, said third hood member having a removable portion through which said disc may be removed from the machine.

No references cited. 

